Right. The same way that...
...water is becoming drier over time.
...grass is becoming redder over time.
...fire is becoming colder over time.
...magic is becoming realer over time.
...dead people are becoming livelier over time.
...China is becoming Frencher over time.
...quotes on this site are becoming saner over time.

Considering the fact that there are much more religions than fundamentalist bible believing christianity he is right.
You can be religious without believing in God & the word.
Belief in God & The Word is, hoewver a subset of being religious.

And if I remember correctly buddhism, for example, can partly be called an atheist religion, so there are also religious atheists.

Of course MikeA fails when he tries to claim that all atheists are religious (maybe even hinting at his belief that atheism is a religion ;)) ;)

Quoth the Raven, "While forlornly slumped upon her egg, her beak upon her breast, the largely sated Dumb-Dumb bird who'd only recently fed, heard, on the wing, aloft, Archibald Collins the Magpie. 'Have you seen Irene Turner-Cartwright, that malicious Daw of ill repute', he said as he flew into her view. 'No. What day is it?', the (cont. page 94)

"Religious:
1: relating to or manifesting faithful devotion to an acknowledged ultimate reality or deity"

Even your own definition doesn't mandate belief in a deity, so doesn't exclude atheists from being religious. In fact nothing excludes atheists from being religious, hence there are Buddhist atheists and even Christian atheists.

Atheism isn't a religion in itself, but it doesn't mean you can't have one.

I'm sorry but I fail to see how one can be atheist and Christian. Surely, by default, a Christian must beleive in the existence of god and that Jesus was devine? Atheists do not beleive in gods, so how can you be both?

"Religious:
1: relating to or manifesting faithful devotion to an acknowledged ultimate reality or deity"

Even your own definition doesn't mandate belief in a deity, so doesn't exclude atheists from being religious. In fact nothing excludes atheists from being religious, hence there are Buddhist atheists and even Christian atheists.

Atheism isn't a religion in itself, but it doesn't mean you can't have one.